Author of books:A Study of Qualities (1941)The Structure of Appearance (1951)Fact, Fiction, and Forecast (1955)Languages of Art: An Approach to a Theory of Symbols (1968)Problems and Projects (1972)Ways of Worldmaking (1978)Of Mind and Other Matters (1984)Reconceptions in Philosophy and other Arts and Sciences (1988, with Catherine Z. Elgin)